using System;
using System.IO;

namespace Org.BouncyCastle.Utilities.Zlib {
	/// <summary>
	/// Summary description for DeflaterOutputStream.
	/// </summary>
	[Obsolete("Use 'ZOutputStream' instead")]
	public class ZDeflaterOutputStream : Stream {
		protected ZStream z=new ZStream();
		protected int flushLevel=JZlib.Z_NO_FLUSH;
		private const int BUFSIZE = 4192;
		protected byte[] buf=new byte[BUFSIZE];
		private byte[] buf1=new byte[1];

		protected Stream outp;

		public ZDeflaterOutputStream(Stream outp) : this(outp, 6, false) {
		}
	
		public ZDeflaterOutputStream(Stream outp, int level) : this(outp, level, false) {
		}
	
		public ZDeflaterOutputStream(Stream outp, int level, bool nowrap) {
			this.outp=outp;
			z.deflateInit(level, nowrap);
		}
	
	
		public override bool CanRead {
			get {
				// TODO:  Add DeflaterOutputStream.CanRead getter implementation
				return false;
			}
		}
	
		public override bool CanSeek {
			get {
				// TODO:  Add DeflaterOutputStream.CanSeek getter implementation
				return false;
			}
		}
	
		public override bool CanWrite {
			get {
				// TODO:  Add DeflaterOutputStream.CanWrite getter implementation
				return true;
			}
		}
	
		public override long Length {
			get {
				// TODO:  Add DeflaterOutputStream.Length getter implementation
				return 0;
			}
		}
	
		public override long Position {
			get {
				// TODO:  Add DeflaterOutputStream.Position getter implementation
				return 0;
			}
			set {
				// TODO:  Add DeflaterOutputStream.Position setter implementation
			}
		}
	
		public override void Write(byte[] b, int off, int len) {
			if(len==0)
				return;
			int err;
			z.next_in=b;
			z.next_in_index=off;
			z.avail_in=len;
			do{
				z.next_out=buf;
				z.next_out_index=0;
				z.avail_out=BUFSIZE;
				err=z.deflate(flushLevel);
				if(err!=JZlib.Z_OK)
					throw new IOException("deflating: "+z.msg);
				if (z.avail_out < BUFSIZE)
				{
					outp.Write(buf, 0, BUFSIZE-z.avail_out);
				}
			}
			while(z.avail_in>0 || z.avail_out==0);
		}
	
		public override long Seek(long offset, SeekOrigin origin) {
			// TODO:  Add DeflaterOutputStream.Seek implementation
			return 0;
		}
	
		public override void SetLength(long value) {
			// TODO:  Add DeflaterOutputStream.SetLength implementation

		}
	
		public override int Read(byte[] buffer, int offset, int count) {
			// TODO:  Add DeflaterOutputStream.Read implementation
			return 0;
		}
	
		public override void Flush() {
			outp.Flush();
		}
	
		public override void WriteByte(byte b) {
			buf1[0]=(byte)b;
			Write(buf1, 0, 1);
		}

		public void Finish() {
			int err;
			do{
				z.next_out=buf;
				z.next_out_index=0;
				z.avail_out=BUFSIZE;
				err=z.deflate(JZlib.Z_FINISH);
				if(err!=JZlib.Z_STREAM_END && err != JZlib.Z_OK)
					throw new IOException("deflating: "+z.msg);
				if(BUFSIZE-z.avail_out>0){
					outp.Write(buf, 0, BUFSIZE-z.avail_out);
				}
			}
			while(z.avail_in>0 || z.avail_out==0);
			Flush();
		}

		public void End() {
			if(z==null)
				return;
			z.deflateEnd();
			z.free();
			z=null;
		}
		
		public override void Close() {
			try{
				try{Finish();}
				catch (IOException) {}
			}
			finally{
				End();
				outp.Close();
				outp=null;
			}
		}
	}
}
